Sheet-metal hand-wheel for chair adjustments, &amp;c.



2li; raras earn CHARLES J. TRAVERS, OF PORT WASHINGTON, WISCONSIN,ASSIGNOR TO GILSON MANUFACTURING C0., .A CORPORATION OF WISCONSIN.

LZOSAS.

Specification of Letters Patent.

ratenteunpr. ie, isis.

Application filed August 31, 1917. Serial N o. 189,073.

To all fr0/rom t may concern:

Be it known that I, CHARLES J. TRAVERS, a citizen of the United States,residing at Port Washington, county of Ozaukee, and State otiVisc/onsin, have invented a new and useful Sheet-Metal Hand-Wheel forChair Adjustments, Sac., of which the follo'e'ing is a specification.

This invention relates to improvements in hand-wheels and is primarilyintended lor use in connection with one ofthe conventional forms or"adjustments ior revolving and tilting chairs, though, as willhereinafter appear, 'the wheel may be used in other relations where itis desirable to use a hand-wheel upon a threaded shaft.

lleretofore, it has been usual to construct hand-wheels for numerouspurposes (chair adjustments included) from cast metal, the thread forcooperating with that of the shaft or standard being cut therein atconsiderable expense, so that not only is the weight oi" .the completedarticle augmented but also the cost as a result of the nishingnecessary.

By my invention, I propose to reduce both the weight and the cost ofmanufacturing the hand-wheel, both of whichl accomplish by toriningthehand-wheel of sheet-metal or' a gage to give it proper rigidity andshaping and stamping the aperture of the same, employed for the purposeof receiving' the threaded shaft or standard, to produce fragments oi `athread designed to and capable of cooperating with the threads of thelatter.

Referring to the drawings* Figure l illustrates in radial section ahand-wheel embodying my invention, the same being designed and adaptedfor use in connection with one of the many conventional forms otchair-adjustments, the latter being shown, in this instance, in sideelevation and broken away at its lower portion to conserve space; and YFig. 2 is a detail in plan of the improved hand-wheel.

Similar numerals of reference indicate similar parts in both figures ofthe drawing'.

Merely for the purpose of illustrating one of the applications of myhand-wheel, I have Y shown the same 1n connection with one wellknowntype of chair-adjustment, wherein 1 designates the usual chair-legs orclaws,

which are arranged about the usual metal hub, the upper flange 2, ofwhich surniounts the upper sides of the legs or claws and are usuallysecured thereto by screws. On the upper side of the flange 2, one sideofits bore, is formed the short upwardly disposed lug 5, wherein isthreaded a laterally disposed stop-screw 6. Within the bore ofl hub islocated for vertical movement the usual adjustingstandard 4, at theupper end of which is carried the yoke (not shown) to which thestretcher and other component parts of the adjustment are attached. Thestandard 4, it will be understood, is longi tudinally threaded, and isencircled by what is generally termed the tl-washer;7 designated as 8,the same having an internal spline for engaging with the longitudinalgroove of the standard. lThe upper side of the J- washer is providedwith a plurality of shallow radial recesses 7, in its upper side, thesame being designed to removably engage with corresponding ribs formedinthe underside of the hub of the hand-wheel. This is but theconventional form of one wellknown type of chair adjustment and itsoperation is readily understood by those conversant with chairconstruction.

In the present instance, and in accordance with' my invention, thehand-wheel 8, is formed of gage or thickness suihcient to give itrigidity, and it will be 'understood that it may have any externalappearance or shape desired. In thepresent instance, the wheel iscircular when viewed. in plan and is concavosconveX in radial section, asurrounding depending la-nge 8a, being eniployed so as to providean'etiectual handhold or grasp. It will be apparent that this flange maybe formed plain, as shown, or with protuberances after the fashion oi,the usual cast-metal wheel. At its center the wheel is provided with anaperture 9, of a diameter adapting it to receive andthereordinary'sheeteinetal oi suitable fore approximate the threadedadjusting edgeV of said thereof, so that when the Wheel is assembledupon the standard 4l, the said flanges, forining, as will be seen,fragments of a thread, will embrace the thread of the standard at theupper and lower sides of the latter as Well as lill the intermediategroove and thus cooperate with the standard in the saine manner as ifthe thread in the Wheel Were continuously formed in the usual manner. Asthe flanges 11 and 12 both embrace the thread and till the intermediategroove, the hand-Wheel is steadied in position. 1

ln order to reinforce the Wheel as Well as help steady the same upon theshaft or standard, l employ in connection with the wheel a smoothlybored cast-metal hub 13, though the same may be of sheetanetal ifpreferred. This hub is provided with an attaching-flange 1l, at itsupper end which, by means of rivets 15, is secured to the underside ofthe liand-'\vlieel. lt is, furthermore, recessed on its underside, at16, to receive the upper portion of the washer 3, and in the bottom ofsaid recess, is provided with the shallow radial ribs 17, to removablyengageivith the corresponding recesses 7 of the d-ivasher when the saidWheel is loire-red to its operative position upon the Washer. Theexterior of the hub 13 is provided with an annular bead 18, and afterthe Wheel has been lowered to position upon the Washer, the stop-screwis rotated so that its inner enr. will engage the bead and thus preventthe hand-Wheel from being elevated a distance more than suilieient topermit of a temporary disengagement of the recesses and the ribs 17.

i hand-Wheel constructed in accordance with my invention vivill be muchlighter than one Vconstructed of castanetal, as is customary, andmoreover is' practically unbrealn able. The doing away with thenecessity of cutting the thread in the standard receiving aperturegreatly .reduces the labor of finishing, the semi-tangential flangesbeing readily stamped during the operation of forming the Wheel.

`Having described my invention, what l claim, is:

1. ifi hand- Wheel for chairadjustments and other purposes, the samebeing formed of sheet-metal and `having an aperture adapted to receivethreaded standard, the aperture being disposed to form a rigid threadadapted to engage and cooperate' With the thread of the standard.

2. A hand-Wheel for chairadjustments and other purposes, the same beingformed of sheet-metal and "having an aperture adapted vto receive athreaded standard, the edge of said aperture being disposed to form arigid fragment of a thread adapted to en- Gopiee of this patent tney beobtained for standard, of a hand-Wheel 'each side thereof oppositelyinclined to five cents'each, by addressing the Washington, D. C,

age and cooperate with that of the standrd.

3. A hand-Wheel for chair-adjustments and other purposes, the same beingformed of sheet-metal and having an aperture adapted to receive athreaded standard, said aperture having at one side a rigid tangentialinclined flange for engaging the thread of said shaft or standard.

fr. A hand-Wheel for chairadjustments and other purposes, the sainebeing of sheet -inetal and having an aperture adapted to receive athreaded standard, said aperture having its edge slit and those portionsof the edge lying at opposite sides of the slit bent in oppositedirections to form rigid semi-tangential inclined flanges embracing theupper and lower edges of the thread of the shaft or standard.

fr hand-Wheel for and other purposes, the same being formed ofsheetmetal and having an aperture adapted to receive a threadedstandard, the edge of said aperture being disposed to form a rigidfragment of a thread cooperating with that of the standard, and a boredhub secured to the hand-Wheel, and having a plain bore coaxial With theaperture of the hand-Wheel and approximating the diameter of thestandard. Y

G. il hand-Wheel for chair-adjustment and other purposes, the same beingformed of sheet-metal and having an aperture slit at one side and themetal thereof at opposite sides of the slit inclined in oppositedirections to 'form upper andV lower rigid semi- 'tangential flangesadapted to coact with and embra e the thread of an adjusting standard atopposite sides thereof, and a hub extending from the face of the hand-Wheel and having a plain bore in line with the aperture in thehand-Wheel and approximating the diameter of the standard.

7. rll`he combination With a threaded formed of sheetmetal and providedWith an aperture ap-V proximating the diameter of the standard andreceiving the same, said aperture having one side a radial slit and themetal at form rigid tangential iianges embracing the upper and loi'versides of the thread of the standard and approximately agreeing in Widthwith the groove of said standard, and a bored iub secured to thehand-wheel upon the underside thereof, the bore of said hubapproximating the diameter of the standard and adapted to movethereover.

CHARLES'J. TRAVERS. lVitnesses T. A. BonnNnR,

H. W. Bomans.

Commissioner 'ni' latens.

formedV chair adjustments

